Abstract
Diffusion of the pulse magnetic field into the metal of the toroidal magnetic core wound by a transformer steel strap is considered. The 1-D numerical model has been developed, which takes into account the viscous-type dynamic losses of magnetization, as well as the eddy currents. The parameter of viscous-type dynamic losses of magnetization was measured on samples of cold-rolled anisotropic transformer steel. The processes of magnetic field propagation in the strap, when the transformer is switched to the voltage source, have been analyzed, and the iteration algorithm of calculation of magnetic field in the strap has been developed. The experimental data have confirmed the obtained calculation results. The problems of application of transformer steel in pulse transformers are considered.
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